Battery pack and power battery system

Abstract

The utility model discloses a battery pack and power battery system, relates to power battery technical field, wherein the battery pack includes casing, a plurality of battery cells, cooling pipe and fan, the casing has the mounting cavity, the plurality of battery cells are arranged in the mounting cavity, the cooling pipe is arranged in the mounting cavity, the fan is arranged in the mounting cavity, and the fan is arranged in the mounting cavity. The cooling pipe is arranged in the shell and is in heat conduction connection with the plurality of battery monomers, the cooling pipe is used for allowing cooling liquid to flow, and the fan is arranged on the shell. According to the technical scheme of the utility model, when the plurality of single batteries work, the cooling liquid flowing in the cooling pipe can take away heat on the plurality of single batteries, and meanwhile, the plurality of single batteries can be cooled through the fan, so that the heat dissipation efficiency is improved. And the plurality of battery monomers are cooled by combining air cooling and liquid cooling, so that the heat dissipation effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, especially a kind of battery pack and power battery system. BACKGROUND

[0002] Power battery is one of the key parts of pure electric vehicle. The temperature and internal temperature uniformity have great influence on its performance and life. Generally, the best working temperature range of lithium ion battery is 15~35 ℃, and the temperature difference should be less than 5 ℃. Higher temperature will accelerate its chemical reaction, thereby causing permanent damage to the battery structure. It seriously affects the service life and performance of the battery, and causes safety hazards. Therefore, efficient battery thermal management system is particularly important.

[0003] In related technologies, the heat dissipation of the battery pack is usually performed by a liquid cooling system or an air cooling system alone, but the thermal conductivity of the cooling liquid and air is limited, so that the overall battery pack has limited heat dissipation effect. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a battery pack and a power battery system, which aims to at least solve the technical problem that in related technologies, the heat dissipation of the battery pack is usually performed by a liquid cooling system or an air cooling system alone, but the thermal conductivity of the cooling liquid and air is limited, so that the overall battery pack has limited heat dissipation effect.

[0005] To achieve the above-mentioned purpose, the utility model provides a battery pack, which comprises:

[0006] A shell having a mounting cavity;

[0007] A plurality of battery monomers arranged in the mounting cavity;

[0008] A cooling pipe arranged in the mounting cavity and in thermal contact with the plurality of battery monomers, the cooling pipe being used for flowing cooling liquid; and

[0009] A fan arranged on the shell.

[0010] In an embodiment, the fan is arranged in the mounting cavity.

[0011] In an embodiment, the shell comprises a main body and a cover plate, the main body has the mounting cavity arranged with an open side in a first direction, and the cover plate covers the open arrangement of the mounting cavity.

[0012] Each of the battery monomers extends along the first direction, and the fan is arranged on the side of the plurality of battery monomers facing the cover plate.

[0013] In an embodiment, the battery pack further comprises:

[0014] a temperature detecting device arranged in the installation cavity; and

[0015] a control device electrically connected with the temperature detecting device and the fan, so as to control the fan according to the detection data of the temperature detecting device.

[0016] In an embodiment, the temperature detecting device comprises a plurality of temperature sensors, each of which is in thermal conduction with at least one of the battery monomers.

[0017] In an embodiment, the cooling pipe is arranged in a bending manner to form a containing space, and the plurality of battery monomers are arranged in the containing space.

[0018] In an embodiment, the cooling pipe is arranged in a bending manner to form a plurality of containing spaces.

[0019] The plurality of battery monomers constitute a plurality of battery groups, each of which comprises a plurality of battery monomers, and the plurality of battery groups are arranged in the plurality of containing spaces.

[0020] In an embodiment, the cooling pipe is in contact with the side wall of the installation cavity.

[0021] In an embodiment, one side wall of the installation cavity is provided with a positioning groove for positioning the battery monomers.

[0022] The utility model further provides a power battery system, including battery pack and circulating pump, the battery pack includes:

[0023] a shell having an installation cavity;

[0024] a plurality of battery monomers arranged in the installation cavity;

[0025] a cooling pipe arranged in the installation cavity and in thermal conduction with the plurality of battery monomers, the cooling pipe being used for flowing cooling liquid; and

[0026] a fan arranged on the shell;

[0027] The circulating pump is communicated with the inlet end and the outlet end of the cooling pipe.

[0028] The utility model discloses a battery pack, including shell, a plurality of battery monomer, cooling pipe and fan, the shell has the installation cavity, a plurality of battery monomers set up in the installation cavity, the cooling pipe sets up in the installation cavity, and with a plurality of battery monomer heat conduction, the cooling pipe is used for cooling liquid flow, the fan sets up on the shell, and such, when a plurality of battery monomer works, the cooling liquid that flows in the cooling pipe can take away the heat on a plurality of battery monomers, can also heat dissipation to a plurality of battery monomers through the fan, utilizes the combination of air cooling and liquid cooling to heat dissipation to a plurality of battery monomers, improves the heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, below will be to the embodiment or prior art description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to the structure shown in these drawings.

[0030] Figure 1 The utility model provides the structural schematic diagram of an embodiment of battery pack;

[0031] Figure 2 For Figure 1 The top view structural schematic diagram of battery pack (remove cover plate).

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 100, battery pack, 1, shell, 11, main body part, 12, cover plate, 101, installation cavity, 1011, positioning groove, 2, battery monomer, 3, cooling pipe, 31, containing space, 4, fan, 5, temperature detection device, 51, temperature sensor.

[0034] The utility model discloses the realization, functional characteristics and advantages will be combined with embodiment, refer to the further description of drawing. DETAILED DESCRIPTION

[0035] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without making creative labor belong to the scope of the utility model protection.

[0036] It should be noted that if the embodiment of the utility model has the direction indication (such as up, down, left, right, front, back……), the direction indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, if the certain posture changes, then the direction indication also changes accordingly.

[0037] In addition, if the embodiment of the utility model has the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, "and / or" or "and / or" appears in the whole text, which means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0038] The power battery is one of the key parts of the pure electric vehicle. The temperature and the internal temperature balance have great influence on its performance and life. Generally, the best working temperature range of lithium ion battery is 15-35 DEG C, and the temperature difference should be less than 5 DEG C. Higher temperature will accelerate the chemical reaction, thereby causing permanent damage to the battery structure. It seriously affects the service life and performance of the battery, and causes safety hazards. Therefore, the efficient battery thermal management system is particularly important. In the related art, the heat dissipation of the battery pack is usually carried out by a liquid cooling system or an air cooling system alone, but the thermal conductivity of the cooling liquid and air is limited, so that the overall battery pack has limited heat dissipation effect.

[0039] The main purpose of the utility model is to provide a battery pack and a power battery system, which aims to at least solve the technical problem that in the related art, the heat dissipation of the battery pack is usually carried out by a liquid cooling system or an air cooling system alone, but the thermal conductivity of the cooling liquid and air is limited, so that the overall battery pack has limited heat dissipation effect.

[0040] Please refer to Figure 1 And Figure 2In an embodiment of the utility model, the battery pack 100 includes a shell 1, a plurality of battery monomers 2, a cooling pipe 3 and a fan 4, the shell 1 has an installation cavity 101, the plurality of battery monomers 2 are arranged in the installation cavity 101, the cooling pipe 3 is arranged in the installation cavity 101 and is in thermal conduction with the plurality of battery monomers 2, the cooling pipe 3 is used to flow cooling liquid, and the fan 4 is arranged on the shell 1.

[0041] In the technical scheme of the utility model, the battery pack 100 includes a shell 1, a plurality of battery monomers 2, a cooling pipe 3 and a fan 4, the shell 1 has an installation cavity 101, the plurality of battery monomers 2 are arranged in the installation cavity 101, the cooling pipe 3 is arranged in the installation cavity 101 and is in thermal conduction with the plurality of battery monomers 2, the cooling pipe 3 is used to flow cooling liquid, and the fan 4 is arranged on the shell 1;So, when the plurality of battery monomers 2 work, the cooling liquid flowing in the cooling pipe 3 can take away the heat on the plurality of battery monomers 2, and the plurality of battery monomers 2 can also be cooled by the fan 4, the plurality of battery monomers 2 are cooled by the combination of air cooling and liquid cooling, and the heat dissipation effect is improved.

[0042] The setting position of the fan 4 has multiple, for example, the fan 4 can be arranged on the shell 1, at this time, when the fan 4 starts, the heat exchange of the shell 1 and the outside can be accelerated, the air temperature in the installation cavity 101 is lower, and the temperature of the battery monomer 2 can be reduced;In the embodiment of the utility model, the fan 4 is arranged in the installation cavity 101, so when the battery monomer 2 works, the fan 4 is started, the fan 4 can accelerate the airflow flow speed in the installation cavity 101, improve the heat exchange efficiency of air and cooling pipe 3 and the battery monomer 2, and then the heat exchange rate of the battery monomer 2 and the cooling pipe 3 is improved;And since the fan 4 is arranged in the installation cavity 101, the overall appearance of the battery pack 100 is more regular.

[0043] Specifically, in the embodiment, the shell 1 includes a main body part 11 and a cover plate 12, the main body part 11 has the installation cavity 101 arranged with one side in the first direction, and the cover plate 12 covers the opening of the installation cavity 101;Each battery monomer 2 extends along the first direction, and the fan 4 is arranged on the side of the plurality of battery monomers 2 towards the cover plate 12, so that when the fan 4 is started, the disturbed airflow can better pass through each battery monomer 2, improving the heat dissipation effect of each battery monomer 2.

[0044] Further, in order to better facilitate the maintenance of the battery pack 100, the fan 4 can be arranged on the cover plate 12. In this way, when the inside of the battery pack 100 needs to be maintained, the cover plate 12 is removed from the main body 11, and the fan 4 is also removed, so that the plurality of battery monomers 2 are exposed, facilitating maintenance.

[0045] It can be understood that the fan 4 will generate noise when running. If the fan 4 is always kept on, it will cause the overall battery pack 100 to generate relatively large noise when running. In the embodiment of the utility model, the battery pack 100 further comprises a temperature detection device 5 and a control device. The temperature detection device 5 is arranged in the mounting cavity 101, and the control device is electrically connected with the temperature detection device 5 and the fan 4, so as to control the fan 4 according to the detection data of the temperature detection device 5. In this way, by arranging a temperature detection device 5 in the mounting cavity 101, when the temperature in the mounting cavity 101 is lower than the preset temperature, that is, when the battery monomer 2 can be ensured to be at a normal working temperature only by the cooling pipe 3, the fan 4 does not need to be started, and the noise is reduced. When the temperature in the mounting cavity 101 is higher than the preset temperature, the fan 4 is started by the control device to improve the heat dissipation capacity, until the temperature is lower than the preset temperature again, and the fan 4 is closed again.

[0046] It should be noted that although the operation of the fan 4 also generates a certain amount of heat, the heat is small, and the temperature of the overall battery pack 100 will still decrease.

[0047] In actual use of the battery pack 100, the temperatures of the battery monomers 2 can be different. If the temperature sensor 51 only detects the air temperature in the mounting cavity 101, it can cause the temperature of a single battery monomer 2 to exceed the preset temperature, while the data detected by the temperature sensor 51 does not exceed, so that the fan 4 does not start. In order to protect each battery monomer 2 as much as possible, in the embodiment of the utility model, please refer to Figure 2 The temperature detection device 5 comprises a plurality of temperature sensors 51, and each temperature sensor 51 is in thermal conduction connection with at least one battery monomer 2. In this way, each battery monomer 2 has a temperature sensor 51 to detect its temperature. As long as the data detected by one of the temperature sensors 51 exceeds the preset temperature, the fan 4 is started by the control device, so that each battery monomer 2 can be better protected.

[0048] In order to improve the heat exchange effect of the cooling pipe 3 and the plurality of battery monomers 2, in some embodiments, the cooling pipe 3 is arranged in a bent manner to form a containing space 31, and the plurality of battery monomers 2 are arranged in the containing space 31.

[0049] Further, the cooling pipe 3 is arranged in a plurality of bent manners to form a plurality of containing spaces 31; the plurality of battery monomers 2 form a plurality of battery groups, each of which includes a plurality of battery monomers 2, and the plurality of battery groups are arranged in the plurality of containing spaces 31; in this way, when the space of the mounting cavity 101 is constant, the longer cooling pipe 3 can be accommodated, and the contact area of the plurality of battery monomers 2 and the cooling pipe 3 can be larger, and the heat exchange efficiency is higher.

[0050] In order to further improve the heat dissipation effect of the cooling pipe 3, in some embodiments, the cooling pipe 3 is in contact with the side wall of the mounting cavity 101; in this way, the heat of the battery monomer 2 can be taken away by the cooling liquid in the cooling pipe 3, and can also be transmitted to the shell 1 through the cooling pipe 3, and then transmitted to the air through the shell 1, which can significantly improve the heat dissipation efficiency.

[0051] In order to facilitate the installation of the battery monomer 2, in the embodiments of the utility model, one side wall of the mounting cavity 101 is provided with a positioning groove 1011, and the positioning groove 1011 is used for positioning the battery monomer 2.

[0052] The utility model also proposes a power battery system, the power battery system includes battery pack 100 and circulating pump, the specific structure of battery pack 100 refers to the above-mentioned embodiment, because the power battery system adopts all the technical schemes of the above-mentioned all embodiments, therefore at least has all the beneficial effects brought by the technical scheme of the above-mentioned embodiment, here will not repeat again. Among them, the circulating pump is communicated with the inlet end and the outlet end of the cooling pipe 3.

[0053] In the technical scheme of the utility model, when the plurality of battery monomers 2 work, the circulating pump is started, so that the cooling liquid in the cooling pipe 3 flows, and the cooling liquid flowing in the cooling pipe 3 can take away the heat on the plurality of battery monomers 2, and the plurality of battery monomers 2 can also be cooled by the fan 4, and the plurality of battery monomers 2 are cooled by the combination of air cooling and liquid cooling, and the heat dissipation effect is improved.

[0054] The above-mentioned is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the contents of the drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises: a housing having a mounting cavity; a plurality of battery cells arranged in the mounting cavity; a cooling pipe arranged in the mounting cavity and in thermal contact with the plurality of battery cells, the cooling pipe being configured to flow a cooling liquid; and a fan arranged on the housing.

2. The battery pack of claim 1, wherein, The fan is arranged in the mounting cavity.

3. The battery pack of claim 2, wherein, The housing comprises a main body portion having the mounting cavity open on one side in a first direction, and a cover plate covering the open side of the mounting cavity. Each of the battery cells extends in the first direction, and the fan is arranged on a side of the plurality of battery cells facing the cover plate.

4. The battery pack of claim 2, wherein, The battery pack further comprises: a temperature detection device arranged in the mounting cavity; and a control device electrically connected to the temperature detection device and the fan, and configured to control the fan according to detection data of the temperature detection device.

5. The battery pack of claim 4, wherein, The temperature detection device comprises a plurality of temperature sensors, each of which is in thermal contact with at least one of the battery cells.

6. The battery pack of any one of claims 1 to 5, wherein, The cooling pipe is arranged in a bent manner to form a receiving space, and the plurality of battery cells are arranged in the receiving space.

7. The battery pack of claim 6, wherein, The cooling pipe is arranged in a bent manner to form a plurality of receiving spaces. The plurality of battery cells form a plurality of battery groups, each of which comprises a plurality of battery cells, and the plurality of battery groups are arranged in the plurality of receiving spaces.

8. The battery pack of claim 1, wherein, The cooling pipe is in contact with a side wall of the mounting cavity.

9. The battery pack of claim 1, wherein, A positioning groove is arranged on a side wall of the mounting cavity, and the positioning groove is configured to position the battery cells.

10. A power battery system, characterized in that, The battery pack comprises: a battery pack as claimed in any one of claims 1 to 9; and a circulating pump connected to an inlet end and an outlet end of the cooling pipe. ​

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